Australian Authorities Believe Flight 370 Turned South Earlier Than Thought

CANBERRA, Australia—Australian authorities believe Malaysia Airlines Flight 370 turned south earlier than previously thought, citing fresh analysis of an attempted phone call to the missing jetliner that provides a new clue to its possible location in the southern Indian Ocean.

Australia's Deputy Prime Minister Warren Truss said the new assessment was able to trace the satellite phone call by Malaysia Airlines ground staff, which...